Interaction of phonons at superfluid helium - solid interfaces
New method to obtain the interaction Hamiltonian of phonons at superfluid helium - solid interface is proposed in the work. Equations of hydrodynamic variables are obtained in terms of second quantization if helium occupies a half-space. The contributions of all processes to the heat flux from solid...
Збережено в:
| Дата: | 2014 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2014
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/153482 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Interaction of phonons at superfluid helium-solid interfaces / I.N. Adamenko, E.K. Nemchenko // Condensed Matter Physics. — 2014. — Т. 17, № 1. — С. 13602:1-9. — Бібліогр.: 20 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | New method to obtain the interaction Hamiltonian of phonons at superfluid helium - solid interface is proposed in the work. Equations of hydrodynamic variables are obtained in terms of second quantization if helium occupies a half-space. The contributions of all processes to the heat flux from solid to superfluid helium are calculated based on obtained Hamiltonian. The angular distribution of phonons that are emitted by solid are found in different processes. It is shown, that all of exit angles of superfuild helium phonons are allowed. The obtained results are compared with experimental data and with previous theoretical works. |
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